<template>
  <div>
     <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
  <!-- 卡片区域 -->
  <el-card>
      <!-- 添加角色列表区域 -->
    <el-row>
        <el-col>
            <el-button type="primary">添加角色</el-button>
        </el-col>
    </el-row>
    <el-table :data="rolesList" border stripe>
        <!-- 展开列 -->
      <el-table-column type="expand">
          <template slot-scope="scope">
              <el-row :class="['bdbottom', i1 ===0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                  <!-- 渲染一级权限 -->
                  <el-col :span="5">
                      <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                      <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 渲染二级和三级权限 -->
                  <el-col :span="19">
                      <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                          <el-col :span="6">
                              <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                              <i class="el-icon-caret-right"></i>
                          </el-col>
                          <el-col :span="18">
                              <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                          </el-col>
                      </el-row>
                  </el-col>
              </el-row>
          </template>
      </el-table-column>
      <el-table-column type="index"></el-table-column>
      <el-table-column label="角色名称" prop="roleName"></el-table-column>
      <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
      <el-table-column label="操作">
        <template slot-scope="scope">
           <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
           <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
           <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
         </template>
      </el-table-column>
    </el-table>
  </el-card>
  <!-- 分配权限的对话框 -->
  <el-dialog title="提示" :visible.sync="setRightdialogVisible" width="50%" @close="setRightdialogClosed">
  <!-- 树形控件 -->
  <el-tree :data="rightslist" :props="treetProps" show-checkbox default-expand-all node-key='id' :default-checked-keys='defKeys' ref="treeRef"></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightdialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allowRights">确 定</el-button>
  </span>
</el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 用户角色列表
      rolesList: [],
      setRightdialogVisible: false,
      // 权限数据
      rightslist: [],
      treetProps: {
        label: 'authName',
        children: 'children'
      },
      //  默认选中的id节点数组
      defKeys: [],
      // 即将要分配权限的id
      roleId: ''
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        this.$message.error('角色列表请求失败')
      }
      this.rolesList = res.data
    //   console.log(this.rolesList)
    },
    // 根据id删除对应的权限
    async removeRightById (role, rightId) {
      // 弹框提示用户是否删除
      const confirmResult = await this.$messagebox.confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除！')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        role.children = res.data
        return this.$message.error('删除权限失败！')
      }
      // 重新渲染权限展示页面
      role.children = res.data
    },
    // 展示权限对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
      }
      this.rightslist = res.data
      console.log(this.rightslist)
      console.log(role)
      // 递归获取三级节点
      this.getLeafKeys(role, this.defKeys)
      this.setRightdialogVisible = true
    },
    // 根据递归的形式，获取角色下所有三级权限的id，并保存到defkeys 数组中
    getLeafKeys (node, arr) {
      // 如果当前节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听权限管理对话框的关闭
    setRightdialogClosed () {
      // 需要重新赋值 不然每次点击分配权限后 会增加id值 导致用户的分配权限出现累加
      this.defKeys = []
    },
    // 为角色分配权限
    async allowRights () {
      const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]
      const idStr = keys.join(',')
      console.log(idStr)
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightdialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
    margin: 7px;
}

.bdtop {
    border-top: 1px solid #eee;
}

.bdbottom {
    border-bottom: 1px solid #eee;
}

.vcenter {
    display: flex;
    align-items: center;
}
</style>
